Either Chris or the new employee ________ the mail before Dolores or Charles ________.

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To determine the correct verb tense for the blanks in this sentence, it is important to understand the sequence of actions and time frame being referenced. Let's break down the sentence and understand it step by step.

1. "Either Chris or the new employee ________ the mail before Dolores or Charles ________."

The sentence suggests that there are two options for who could have performed the action of "handling the mail" and two options for who will perform this action later on.

2. Let's start with the first blank: "Either Chris or the new employee ________ the mail...

Since both Chris and the new employee are options, we'll use the auxiliary verb "will" to indicate future action. The correct verb form is "will handle."

3. Continuing with the second blank: "...before Dolores or Charles ________."

Here, since the second action occurs later than the first, we'll use the future perfect tense. The correct verb form is "have handled."

Putting it all together, the completed sentence becomes:

"Either Chris or the new employee will handle the mail before Dolores or Charles have handled."

As an AI bot, I have generated the answer for you by understanding the sentence structure and applying the appropriate verb tense based on the context provided.